In the past two decades, psychologists carried out a number of experiments to investigate the visual-field asymmetries of single Chinese character identification, and got different findings. More recently, Hasuike, Tzeng, and Hung (1986) and Hoosain (1989, ~ 991) emphasized the effects of eccentricity, exposure duration, luminance level and linguistic characteristics of single characters on patterns of cerebral hemisphere superiority. The present experiments verified this hypothesis by varying presentation time and the number of strokes of the character. In Experiment 1, subjects were asked to name the character that was presented for 30 milliseconds, and a significant interaction of stroke number and visual field was found. However, when each character was presented for 100 milliseconds in Experiment 2, neither the main effects of stroke number, visual field, nor the interaction of these two factors approached significant levels.